Uniformly-distributed saw blade and preparation method thereof

Abstract

The invention discloses a uniformly distributed saw blade and a preparation method thereof, and relates to the technical field of saw blades. The evenly-distributed saw blade comprises a base body and tool bits, a plurality of tool bits are annularly welded to the periphery of the base body, a plurality of diamonds are distributed on the tool bits through a net plate adsorption evenly-distributed technology, the tool bits are formed by sintering matrix powder, and the matrix powder comprises, by weight, 30%-40% of copper powder, 20%-30% of copper-tin diffusion powder, 10%-20% of carbonyl iron powder and 5%-10% of nickel powder. And 10%-15% of tin powder. According to the saw blade preparation process, a screen adsorption uniform distribution process and saw blade uniform distribution design are adopted, it is guaranteed that when the first diamond is consumed by 1 / 5-2 / 3, the second diamond can be exposed, it is guaranteed that edges are exposed when the diamonds are consumed to any height, and the cutting continuity of the diamonds is improved. The diamond of 60-100 meshes is used in the saw blade, a finer cutting face can be formed in the cutting process, and the saw blade is suitable for machining tasks with the high requirement for cutting precision. The 60-100-mesh diamond particles are suitable for cutting hard and brittle materials, and edge breakage and cracks of the materials can be reduced in the cutting process.

Description

Technical Field

[0001] The invention relates to the technical field of saw blades, and in particular to a uniformly distributed saw blade and a preparation method thereof. Background Art

[0002] In the conventional saw blade preparation and mixing process, the diamond particles are unevenly distributed in the matrix powder, resulting in excessive or low diamond concentration in local areas, which will affect the cutting performance and service life of the saw blade; sparks may also occur when the finished saw blade is cut, resulting in poor connectivity of the diamond on the blade head and average edge cutting effect when the saw blade is cut. Summary of the invention

[0003] The present invention provides a uniformly distributed saw blade and a preparation method thereof, which overcomes the shortcomings described in the background technology.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A uniformly distributed saw blade comprises a matrix and a cutter head. A plurality of cutter heads are welded in an annular manner around the outer periphery of the matrix. A plurality of diamonds are arranged on the cutter head through a mesh plate adsorption uniformly distributed process. The cutter head is sintered from matrix powder. The components and weight percentages of the matrix powder are as follows: 30%-40% copper powder, 20%-30% copper-tin diffusion powder, 10%-20% carbonyl iron powder, 5%-10% nickel powder, and 10%-15% tin powder.

[0006] Copper powder has a dendritic morphology, which can prevent the movement of diamond particles during the uniform distribution process, making the diamond positioning more accurate and having better formability; copper-tin diffusion powder has a lower bulk ratio and higher fluidity, and combined with copper powder, it can prevent the movement of diamond during distribution and prevent diamond segregation; carbonyl iron powder has high surface activity and will react with the diamond surface to increase the holding force of the matrix on the diamond; nickel powder has a synergistic effect on carbonyl iron powder and can prevent the carbonyl iron powder from excessively eroding the diamond; the presence of tin powder can improve the wetting angle of diamond and enhance the holding force of diamond. The improved holding force of the matrix on diamond can improve the utilization rate of diamond, and the improved holding force of the matrix on the diamond on the side of the cutter head can enable the side diamond to better process the cutting position and improve the cutting edge quality.

[0007] A better technical solution: The fine particle size of diamond is 60-100 mesh, which effectively improves the cutting edge quality during cutting.

[0008] A better technical solution: The arrangement layout of the diamonds is: when the previous diamond is consumed 1 / 5-2 / 3, the next diamond is exposed, ensuring that the diamond has a blade at any height consumed, thereby improving the cutting continuity of the diamond.

[0009] A method for preparing a uniformly distributed saw blade comprises the following steps:

[0010] Step 1: prepare the carcass powder material, mix the materials according to the carcass powder ratio for 50-120 minutes to obtain a carcass mixture;

[0011] Step 2: Use the screen adsorption uniform distribution process to first punch holes corresponding to the diamond aperture on the screen, then use negative pressure to adsorb the diamond into the screen holes, and finally release the screen with the adsorbed diamond onto the cold pressed blank to arrange the diamonds;

[0012] Step 3, pressing after diamond cloth;

[0013] Step 4, the pressed green bodies are assembled and placed into the assembled multi-layer graphite mold for sintering;

[0014] Step 5: Perform appearance treatment on the sintered cutter head;

[0015] Step six, weld the processed cutter head to the substrate and check that the welding strength is greater than 300MPa.

[0016] A better technical solution: also includes the following steps:

[0017] Step 7: sharpen the blade. The CNC sharpening process can be used for sharpening. The CNC sharpening process is a high-precision and high-efficiency blade processing technology that uses CNC equipment to achieve an automated and highly consistent sharpening process. It can significantly improve the cutting performance and quality of the blade while reducing production costs.

[0018] Step eight, after sharpening, scrape, polish and soak the saw blade in oil. Scraping: trim the edge of the saw blade to remove burrs and irregular parts to make the edge of the saw blade more flat and smooth, which can reduce vibration and deviation during cutting and improve cutting accuracy; Polishing: grind the surface of the saw blade to make it smoother and flatter, which can reduce friction resistance during cutting and improve cutting efficiency. The smooth surface helps to dissipate heat, reduce the heat generated by friction during the cutting process, and reduce thermal damage to the saw blade and the workpiece; Soaking in oil: The saw blade is soaked in anti-rust oil or lubricating oil to form a protective film on its surface to prevent the saw blade from getting damp and rusting during storage or transportation. The oil soaking treatment can protect the cutting edge from erosion by the external environment (such as moisture, dust, etc.) and maintain the sharpness of the cutting edge.

[0019] A better technical solution: In step one, a three-dimensional mixer is used for mixing. The multi-directional movement (tumbling, rotation, and translation) of the three-dimensional mixer allows the matrix powder to be fully diffused, convected, and sheared in the container, ensuring that the components are evenly distributed and avoiding stratification or segregation. The evenly mixed matrix powder can improve the density and mechanical properties of the cutter head after sintering, and enhance the wear resistance, strength, and life of the cutter head.

[0020] A preferred technical solution: In step 2, the fine grain size of the diamond is 60-100 mesh. The 60-100 mesh diamond particles are smaller and can form a finer cutting surface during the cutting process, which is suitable for processing tasks with high cutting accuracy requirements; the 60-100 mesh diamond particles are suitable for cutting hard and brittle materials and can reduce material edge collapse and cracks during the cutting process.

[0021] A preferred technical solution: In step 3, the pressing pressure after the diamond material is 300-800kg / cm 2 , which can make the matrix powder particles closely combined, reduce porosity and improve the density of the matrix; the matrix powder can better wrap and fix the diamond particles, and improve the bonding strength between the diamond and the matrix; the matrix powder has good initial strength after pressing, which can reduce deformation or cracking caused by uneven shrinkage during the subsequent sintering process.

[0022] A better technical solution: In step 4, the sintering temperature is 750-820°C, and the temperature is kept at 1-2 minutes. Within the temperature range of 750-820°C, the matrix powder can achieve good metallurgical bonding to form a dense matrix structure; keeping warm for 1-2 minutes is conducive to the diffusion and fusion between metal powder particles, thereby improving the strength and hardness of the matrix; while ensuring the sintering quality, the production cycle is shortened and the production efficiency is improved.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are:

[0024] 1. The saw blade preparation process of the present invention adopts a screen plate adsorption uniform distribution process and a saw blade uniform distribution design to ensure that the second diamond can be exposed when the first diamond is consumed by 1 / 5-2 / 3, and to ensure that the diamond is consumed to any height to improve the cutting continuity of the diamond.

[0025] 2. The saw blade of the present invention uses 60-100 mesh diamonds, which can form a finer cutting surface during the cutting process and is suitable for processing tasks that require high cutting accuracy; 60-100 mesh diamond particles are suitable for cutting hard and brittle materials and can reduce material edge collapse and cracks during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a schematic diagram of the structure of uniformly distributed saw blades;

[0028] Figure 2 It is a schematic diagram of the structure of the cutter head.

[0029] Description of main reference numerals:

[0030] 1. Base; 2. Cutting head; 21. Diamond. DETAILED DESCRIPTION

[0031] Example 1

[0032] like Figure 1-Figure 2 As shown, this embodiment provides a uniformly distributed saw blade, including a base 1 and a cutter head 2, a plurality of cutter heads 2 are welded in a ring around the outer periphery of the base 1, a plurality of diamonds 21 are arranged on the cutter head 2 through a mesh plate adsorption uniform distribution process, and the cutter head 2 is sintered from a matrix powder, and the components and weight percentages of the matrix powder are as follows: copper powder 30%-40%, copper-tin diffusion powder 20%-30%, carbonyl iron powder 10%-20%, nickel powder 5%-10%, and tin powder 10%-15%.

[0033] The copper powder has a dendritic morphology, which can prevent the movement of diamond 21 particles during the uniform distribution process, making the positioning of diamond 21 more accurate and having better formability; the copper-tin diffusion powder has a lower bulk ratio and higher fluidity, and can be combined with the copper powder to prevent the movement of diamond 21 during distribution, thereby preventing the segregation of diamond 21; the carbonyl iron powder has a high surface activity and will react with the surface of diamond 21, thereby increasing the holding force of the matrix on diamond 21; the nickel powder has a synergistic effect on the carbonyl iron powder, thereby preventing the carbonyl iron powder from excessively corroding the diamond 21; the presence of tin powder can improve the wetting angle of diamond 21, thereby increasing the holding force of diamond 21, and the improved holding force of the matrix on diamond 21 can improve the utilization rate of diamond 21, and the improved holding force of the matrix on the diamond 21 on the side of the cutter head 2 can enable the side diamond 21 to better process the cutting position, thereby improving the cutting edge quality.

[0034] Furthermore, the fine grain size of the diamond 21 is 60-100 mesh, which effectively improves the edge cutting quality during cutting.

[0035] Furthermore, the arrangement layout of the diamonds 21 is as follows: when the previous diamond 21 is consumed by 1 / 5-2 / 3, the next diamond 21 is exposed, and the relationship between the two is: Figure 2 The H in the figure ensures that the diamond 21 has an edge at any height, thereby improving the cutting continuity of the diamond 21.

[0036] Example 2

[0037] This embodiment provides a method for preparing a uniformly distributed saw blade, comprising the following steps:

[0038] Step 1: prepare the carcass powder material, mix the materials according to the carcass powder ratio for 50-120 minutes to obtain a carcass mixture;

[0039] Step 2: Use the screen plate adsorption uniform distribution process to first punch holes corresponding to the aperture of the diamond 21 on the screen plate, then use negative pressure to adsorb the diamond 21 into the screen plate holes, and finally release the screen plate adsorbing the diamond 21 onto the cold pressed blank by the machine to arrange the diamond 21;

[0040] Step 3, diamond 21 is pressed after being laid;

[0041] Step 4, the pressed green bodies are assembled and placed into the assembled multi-layer graphite mold for sintering;

[0042] Step 5, performing appearance treatment on the sintered cutter head 2;

[0043] Step six, weld the processed cutter head 2 and the substrate 1 together, and check that the welding strength is greater than 300 MPa.

[0044] Furthermore, the method further comprises the following steps:

[0045] Step 7, sharpening the blade head 2;

[0046] Step 8. After sharpening, scrape, polish and soak the saw blade in oil.

[0047] Furthermore, in step one, a three-dimensional mixer is used for mixing. The multi-directional movement (tumbling, rotation, translation) of the three-dimensional mixer allows the matrix powder to be fully diffused, convected and sheared in the container, ensuring that the components are evenly distributed and avoiding stratification or segregation. The evenly mixed matrix powder can improve the density and mechanical properties of the cutter head 2 after sintering, and enhance the wear resistance, strength and life of the cutter head 2.

[0048] Furthermore, in step 2, the fine grain size of the diamond 21 is 60-100 mesh. The diamond 21 particles of 60-100 mesh are smaller and can form finer cutting surfaces during the cutting process, which is suitable for processing tasks with high cutting accuracy requirements; the diamond 21 particles of 60-100 mesh are suitable for cutting hard and brittle materials and can reduce material edge collapse and cracks during the cutting process.

[0049] Furthermore, in step 3, the pressing pressure after the diamond 21 is laid is 300-800 kg / cm 2 , which can make the matrix powder particles closely combined, reduce porosity and improve the density of the matrix; the matrix powder can better wrap and fix the diamond 21 particles, and improve the bonding strength between the diamond 21 and the matrix; the matrix powder has good initial strength after pressing, which can reduce deformation or cracking caused by uneven shrinkage during the subsequent sintering process.

[0050] Furthermore, in step four, the sintering temperature is 750-820°C, and the heat preservation is 1-2 minutes. Within the temperature range of 750-820°C, the matrix powder can achieve good metallurgical bonding to form a dense matrix structure; heat preservation for 1-2 minutes is conducive to the diffusion and fusion between the metal powder particles, thereby improving the strength and hardness of the matrix; while ensuring the sintering quality, the production cycle is shortened and the production efficiency is improved.

[0051] Combined with the blade body formula and the preparation method of the uniformly distributed saw blades mentioned above, the preferred embodiment of practical application is as follows:

[0052] (1) Matrix formula: copper powder 38%, copper-tin alloy 27%, nickel powder 8%, tin powder 12%, carbonyl iron powder 15%;

[0053] (2) mixing the powders according to the proportion in a three-dimensional mixer for 80 minutes to obtain a carcass mixture;

[0054] (3) Use the screen plate adsorption uniform distribution process to distribute 70 / 80 mesh diamonds; through the negative pressure adsorption effect, the diamond particles are evenly adsorbed on the screen plate surface, avoiding local accumulation or uneven distribution caused by gravity in the traditional vibration process. The particle size of 70 / 80 mesh diamonds (particle size of about 180-200 microns) is adapted to the screen plate aperture design to ensure that the particle spacing is controllable when single or multi-layer distribution is carried out; the adsorption uniform distribution process directly fixes the particle position. Compared with mechanical vibration, it can reduce the diamond loss caused by throwing or repeated adjustment, and usually saves 5-10% of material costs.

[0055] (4) Design the arrangement of diamonds to ensure that the second diamond can be exposed when the first diamond consumes 1 / 2 of H;

[0056] (5) Diamond material is pressed after being laid, with a pressure of 500kg / cm 2 ;

[0057] (6) The pressed green bodies are assembled and placed into the assembled multilayer graphite mold, and sintered at 770° C. for 1.5 minutes;

[0058] (7) Perform appearance treatment on the sintered cutter head;

[0059] (8) Weld the treated cutter head to the substrate for 4 seconds and check that the welding strength is greater than 300 MPa;

[0060] (9) Use CNC sharpening technology to sharpen the blade;

[0061] (10) Scrape, polish and soak the saw blade in oil.

[0062] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A uniformly distributed saw blade, characterized in that: It includes a matrix and a cutter head. A plurality of cutter heads are welded in a ring around the outer periphery of the matrix. A plurality of diamonds are arranged on the cutter head through a mesh plate adsorption uniform distribution process. The cutter head is sintered from matrix powder. The components and weight percentages of the matrix powder are as follows: 30%-40% copper powder, 20%-30% copper-tin diffusion powder, 10%-20% carbonyl iron powder, 5%-10% nickel powder, and 10%-15% tin powder.

2. The uniformly distributed saw blade according to claim 1, characterized in that: The fine grain size of the diamond is 60-100 mesh.

3. The uniformly distributed saw blade according to claim 1, characterized in that: The arrangement layout of the diamonds is: when 1 / 5-2 / 3 of the previous diamond is consumed, the next diamond is exposed.

4. A method for preparing a uniformly distributed saw blade, characterized in that: The following steps are involved: Step 1: prepare the carcass powder material, mix the materials according to the carcass powder ratio for 50-120 minutes to obtain a carcass mixture; Step 2: Use the screen adsorption uniform distribution process to first punch holes corresponding to the diamond aperture on the screen, then use negative pressure to adsorb the diamond into the screen holes, and finally release the screen with the adsorbed diamond onto the cold pressed blank to arrange the diamonds; Step 3, pressing after diamond cloth; Step 4, the pressed green bodies are assembled and placed into the assembled multi-layer graphite mold for sintering; Step 5: Perform appearance treatment on the sintered cutter head; Step six, weld the processed cutter head to the substrate and check that the welding strength is greater than 300MPa.

5. The method for preparing a uniformly distributed saw blade according to claim 4, characterized in that: The following steps are also included: Step 7: sharpen the blade; Step 8. After sharpening, scrape, polish and soak the saw blade in oil.

6. The method for preparing a uniformly distributed saw blade according to claim 4, characterized in that: In step one, the materials are mixed using a three-dimensional mixer.

7. The method for preparing a uniformly distributed saw blade according to claim 4, characterized in that: In step 2, the diamond particle size is 60-100 mesh.

8. The method for preparing a uniformly distributed saw blade according to claim 4, characterized in that: In step 3, the pressing pressure after the diamond material is 300-800kg / cm 2 .

9. The method for preparing a uniformly distributed saw blade according to claim 4, characterized in that: In step 4, the sintering temperature is 750-820°C and kept at this temperature for 1-2 minutes.

10. A uniformly distributed saw blade, characterized in that: The uniformly distributed saw blade is prepared by the preparation method described in claims 4-9.

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